From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792832275; b=I2Pe29XOZh3d+Pd4W8sOLNK/v8TY7Qrq5ZjiSK56YkGG/hjmRXlky4MLAS8QdEv+T1pH INvZ6s5482XcxyfQ39L+cOgbIEjQNK12qrx0IY1ip44tFggZLYRSBTJ++cOJLIy+LXSXZ uyqDPWCgA2CYJLTtyHV0QFbSuHEgvGHArkNN14WSxM5JFHZRYS1OiJNxuVkginEsswIKu GQhdt5C5j6F5lszRCBWifhnfERym1Ad0mTB1/FS+Od5BJN2qKLvB20BnPIlVl9lqlxgnM e8fzT1g6LJxpafwSjOPemT8OS6XSUtVrShV3QMAEO9B1V324GKxzOF3Af3KoxxlrqXA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792832275; h=Received:DKIM-Signature:Date:To:From:Subject:Message-Id; bh=nIwOLDPwuUhUyG7wfQhJV3fKbml7MRVfPMa2YWdUI8g=; b=h04aXWTL9qk/yYWguLyxkEUyDCETSJGkeKS0CeMs0lST/Z7VzR7N9KR9ubyoG50Jn79k bUHneCJ7/hpXGMpPkM7kWBAaEtEMz00JcRh1ZolHzzabXwZOUkdQjkpfhvUkIJzR07mpA tCOzIa0wq/Fm6e6bXsQtZErykv7YjcfxHM9rp11rqx73h89DIYGzwzxnfVFlJzP0GXFm/ jqT9HaB0xsvAYUaBCOZMZsGoNgsV5/8aY6CujoyR39YRICAv/8Appzt1GLKmM2STJI3Lr Pw2AjMM2Hql9bx2TD7WtIpc015EnZhiU8kvlq2kxs+t1oaeJwZYBsrqom+9Qs8aADcg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=B4w6tlfo; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5B2E2606A31A for ; Sat, 24 Oct 2026 08:57:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=B4w6tlfo Received: by smtp.kernel.org (Postfix) with ESMTPSA id 296AB1F01825; Sat, 24 Oct 2026 08:57:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1792832275; bh=nIwOLDPwuUhUyG7wfQhJV3fKbml7MRVfPMa2YWdUI8g=; h=Date:To:From:Subject; b=B4w6tlfoO+0uZD4WHQFDlP9xJH9gxIGgFZBwOfFdU1VDGjHaRXDtswD6gzh7puYIU owMYFxX27GHgJolue1FX5uL/3xskA3tPBU056eQwCE6/6tZSfW4SQaPPiz2nhmTz/q GcRwozH9tPy55s+vqO5XBKm/+q8aAAH2VMbtr1Bk= Date: Sat, 24 Oct 2026 01:57:54 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,vbabka@kernel.org,usama.arif@linux.dev,surenb@google.com,shuah@kernel.org,ryan.roberts@arm.com,rppt@kernel.org,nico.pache@linux.dev,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,lance.yang@linux.dev,kevin.brodsky@arm.com,dev.jain@arm.com,david@kernel.org,baolin.wang@linux.alibaba.com,baohua@kernel.org,yeoreum.yun@arm.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] kselftest-mm-integrate-huge-page-checks.patch removed from -mm tree Message-Id: <20261024085755.296AB1F01825@smtp.kernel.org> X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list The quilt patch titled Subject: kselftest: mm: integrate huge page checks has been removed from the -mm tree. Its filename was kselftest-mm-integrate-huge-page-checks.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Yeoreum Yun Subject: kselftest: mm: integrate huge page checks Date: Thu, 01 Oct 2026 22:17:53 +0100 check_large_folios() only checks for large folios without distinguishing between anonymous and file-backed huge pages. To add huge page type checking, integrate the huge page checks into __check_huge() and __check_type(): 1. If hpage_size == pmd_pagesize, check PAGE_IS_HUGE instead of using check_large_folios(), since only the mapping type matters. This identifies PMD-mapped huge pages. 2. Otherwise, use check_large_folios() to detect large folios. This covers mTHP cases. 3. Check the folio flags according to the huge page type via __check_type() Link: https://lore.kernel.org/20261001-fix_split-v9-3-0f4ba8bbdbdf@arm.com Signed-off-by: Yeoreum Yun Signed-off-by: Andrew Morton Suggested-by: David Hildenbrand (Arm) Suggested-by: Zi Yan Acked-by: Zi Yan Cc: Lorenzo Stoakes Cc: Baolin Wang Cc: Liam R. Howlett Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Lance Yang Cc: Usama Arif Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Shuah Khan Cc: Kevin Brodsky --- tools/testing/selftests/mm/vm_util.c | 90 +++++++++++++++---------- 1 file changed, 56 insertions(+), 34 deletions(-) --- a/tools/testing/selftests/mm/vm_util.c~kselftest-mm-integrate-huge-page-checks +++ a/tools/testing/selftests/mm/vm_util.c @@ -392,76 +392,98 @@ out: return ret; } -enum check_huge_type { - CHECK_HUGE_ANON, - CHECK_HUGE_FILE, +enum check_type { + CHECK_TYPE_ANON, + CHECK_TYPE_FILE, }; -static bool check_huge_type(uint64_t categories, enum check_huge_type type) +static bool __check_type(void *addr, size_t len, uint64_t page_size, + enum check_type type) { - const bool file = categories & PAGE_IS_FILE; + bool ret = false; + int pagemap_fd; + char *start = addr; + char *end = start + len; + uint64_t categories; + + pagemap_fd = open(PAGEMAP_PATH, O_RDONLY); + if (pagemap_fd < 0) + ksft_exit_fail_perror("open pagemap"); - switch (type) { - case CHECK_HUGE_ANON: - return !file; - case CHECK_HUGE_FILE: - return file; + for (; start < end; start += page_size) { + categories = pagemap_scan_get_categories(pagemap_fd, start); + if ((categories & PAGE_IS_PRESENT) != PAGE_IS_PRESENT) + continue; + + if ((type == CHECK_TYPE_FILE) != !!(categories & PAGE_IS_FILE)) + goto out; } - return false; + ret = true; + +out: + close(pagemap_fd); + return ret; } -static bool __check_pmd_huge(void *addr, size_t len, int nr_hpages, - uint64_t hpage_size, enum check_huge_type type) +static bool __check_huge(void *addr, size_t len, int nr_hpages, + uint64_t hpage_size) { + bool ret = false; int pagemap_fd; int nr_pmd_mappings = 0; + uint64_t pmd_pagesize; uint64_t categories; char *start = addr; char *end = start + len; + pmd_pagesize = read_pmd_pagesize(); + if (!pmd_pagesize) + ksft_exit_fail_msg("reading PMD pagesize failed\n"); + pagemap_fd = open(PAGEMAP_PATH, O_RDONLY); if (pagemap_fd < 0) ksft_exit_fail_perror("open pagemap"); + if (hpage_size != pmd_pagesize) { + ret = check_large_folios(addr, len, nr_hpages, hpage_size); + goto out; + } + for (; start < end; start += hpage_size) { categories = pagemap_scan_get_categories(pagemap_fd, start); - if (!(categories & PAGE_IS_HUGE)) - continue; - if (check_huge_type(categories, type)) + if (categories & PAGE_IS_HUGE) nr_pmd_mappings++; } - close(pagemap_fd); - return nr_hpages == nr_pmd_mappings; + if (nr_pmd_mappings != nr_hpages) + goto out; + + ret = true; + +out: + close(pagemap_fd); + return ret; } bool check_huge_anon(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) { - uint64_t pmd_pagesize = read_pmd_pagesize(); - - if (!pmd_pagesize) - ksft_exit_fail_msg("reading PMD pagesize failed\n"); + const uint64_t scan_mapping_size = (nr_hpages > 0) ? hpage_size : psize(); - if (hpage_size == pmd_pagesize) - return __check_pmd_huge(addr, len, nr_hpages, hpage_size, - CHECK_HUGE_ANON); + if (!__check_huge(addr, len, nr_hpages, hpage_size)) + return false; - return check_large_folios(addr, len, nr_hpages, hpage_size); + return __check_type(addr, len, scan_mapping_size, CHECK_TYPE_ANON); } bool check_huge_file(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) { - uint64_t pmd_pagesize = read_pmd_pagesize(); - - if (!pmd_pagesize) - ksft_exit_fail_msg("reading PMD pagesize failed\n"); + const uint64_t scan_mapping_size = (nr_hpages > 0) ? hpage_size : psize(); - if (hpage_size == pmd_pagesize) - return __check_pmd_huge(addr, len, nr_hpages, hpage_size, - CHECK_HUGE_FILE); + if (!__check_huge(addr, len, nr_hpages, hpage_size)) + return false; - return check_large_folios(addr, len, nr_hpages, hpage_size); + return __check_type(addr, len, scan_mapping_size, CHECK_TYPE_FILE); } bool check_huge_shmem(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) _ Patches currently in -mm which might be from yeoreum.yun@arm.com are